FAN5071

www.fairchildsemi.com FAN5071 High Performance Programmable Synchronous DC-DC Controller for Multi-Voltage Platforms Features Output programmable in 25mV steps from 1.05V to 1.825V using a dynamically programmable integrated 5-bit DAC Controls adjustable linears for Vclock (2.5V), Vnorthbridge (1.8V) or Vagp (selectable 1.5V/3.3V), and Vadj (1.2V nominal) Remote sense Programmable Active Droop™ up to 200mV Drives N-Channel MOSFETs Overcurrent protection using MOSFET sensing Overvoltage protection including startup 85% efficiency typical at full load Integrated Power Good and Enable/Soft Start functions Linears start instantly Meets Intel VRM8.5 specifications using minimum number of external components 24 pin SOIC package Description The FAN5071 is a synchronous mode DC-DC controller IC which provides a highly accurate, programmable set of output voltages for multi-voltage platforms such as the Intel Pentium III, and provides a complete solution for all Intel VRM8.5 CPU applications, and for other high-performance processors. The FAN5071 features remote voltage sensing, independently adjustable current limit, and a proprietary wide-range Programmable Active Droop™ for optimal converter transient response and VRM8.5 compliance. The FAN5071 uses a 5-bit D/A converter to dynamically program the output voltage during operation from 1.05V to 1.825V in 25mV steps. The FAN5071 uses a high level of integration to deliver load currents in excess of 28A from a 5...